Herz Valves UK

HERZ FeuerungstechnikBio heat from HERZ for theBurgenland wine-growing areaThe woodchip-operated BioMatic combi equipment inNeckenmarkt with a heat output of 800 kW, takes careof environmentally-friendly energy supply.Both types of HERZ BioMatic equipmentwith a heat output of 400 kW each areequipped with their own ash extractorspecially built for the equipment.Since 22nd December 2004 the woodchip-fuelledcombi equipment fromHERZ has been operating in theBurgenland wine region of Neckenmarkt.Seven households, 28 factories and two publicbuildings are currently being suppliedwith bio heat from the local heat supplyequipment. There is also an option for heatsupply for 60 additional houses, and duringthe course of 2005 another ten wereincluded.Intelligent, automated combiequipmentThe HERZ heating equipment, which wasdesigned and built in close collaborationwith the Riebenbauer technical officeand operated by Neckenmarkt districtheating company, consists of two woodchipboilers with a heat output of 400 kWeach. Both installations of the BioMatictype are made into combi equipmentusing BioControl 3000. The intelligentcontrols on the one hand allow optimumcombustion and automation of the equipment,and on the other hand ensureequal usage and optimum deployment ofboth pieces of equipment and thus optimumprovision of fuel.The combi or twin equipment was chosenin order to achieve better coverage of thepartial load area. That means, for example,that only one unit is in operation duringthe transition period, as only part of theheat output and not the full 800 kW is required.Therefore it is always possible toachieve optimum efficiency and therebysave energy.Perfectly planned heating houseThe newly built heating house consists ofa boiler room, a control room and a woodchipstore (store capacity 1,000 m 3 ). Eachof the two HERZ boilers is loaded via tworoom extractors. The boiler equipmentwas constructed for an operating temperatureof 95°C and a maximum operatingpressure of 3 bar. The heat outlet hasbeen equipped with changeover stations,which are fitted with plate heat exchangers.Thus there is a system separationbetween the pre-insulated pipe network(primary network) and the heating equipment(secondary network) in the individualobjects.In the control room there are electronicswitchboards for electrical distributionand switchboards that contain the controland operation equipment by which thewhole plant is automatically controlled.The fuel output is carried out via removalfrom the room and screw conveyor to eachwoodchip boiler with the relevant burnbackprotection in place. In the boilerroom there is also expansion equipmentwith controls, the pump group and a12,000 litre buffer store.Automatic ash removalA special feature of this equipment is theautomatic ash removal. The ashes whichfall down from the combustion chamber,the fly ash from the automatic heat exchangercleaning system and from bothHORIZONTAL SECTION OF HEATING ROOMdrinkingwater pipecontrol roomheating roombuffermulti-cyclones are taken out in an ashremoval system designed and built byHERZ, into a container outside the boilerroom. Here it is possible to speak of almost100 % automated equipment with continuousdust submission under 25 mg/Nm 3 .This design guarantees that the boilerroom remains dust-free and clean.Through the automatic ash removal of allash waste into a container located outsidethe boiler room, with a volume of around2m 3 , the continual cleaning of the flue gasaffected parts is guaranteed. The ashwaste is also used as fertiliser.Environmentally-friendly fuel fromthe surroundingsThe fuel is stored in the woodchip store.Only untreated wood in the form of forestwood chips is used as fuel. A moveable threepartlid is attached to the roof constructionof the woodchip store. The fuel is suppliedby members of the community or externalsuppliers. Each year around 1,700 metres ofloose woodchips is required. All the woodchipis taken from Neckenmarkt’s ownforests.The ground plan ofthe boiler roomshows the configurationof the combiequipment includingdust cutterand automatic ashremoval in ahydraulically drivencontainer outsidethe heatingcentres.3/2005 15